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Mr. Howard Hold <br /> August 27, 2004 <br /> Page 4 <br /> Monitoring Well Construction <br /> The final monitoring well designs will be based on the geophysical logs obtained in the field, <br /> lithologic evaluation, and correlation of the geologic data at the new sites with existing geologic <br /> data. The MW5A and MW6A wells will have total depths of approximately 140 feet. Well <br /> MW6B will be completed to a depth of approximately 240 feet. The boreholes for the zone <br /> completions will be 12-1/4 inches in diameter with 6-inch diameter SDR-17, ASTM F480 PVC <br /> well casing and screen. This well casing material meets the California Department of Water <br /> Resources guidelines for well construction (Bulletin 74-90). Centralizers will be placed directly <br /> above and below the screen in each well; centralizers will also be placed at 40-foot intervals <br /> from the centralizer located near the top of the screen to the surface. Each wellhead will be <br /> secured with a locking mechanism to prevent vandalism. Example well profiles are shown in <br /> Figures 2 and 3. <br /> Monitoring well development will be performed by bailing and pumping. Final development <br /> will occur with submersible pumping equipment. <br /> Cuttings and fluids from the drilling program will be spread on the ground adjacent to each well <br /> location. Fluids generated from development activities will be discharged away from the <br /> monitoring well site at a location that will not impact site operations or(as applicable) nearby <br /> agricultural operations. <br /> Baseline Sampling <br /> Following well construction and development, dedicated pumping equipment will be installed in <br /> each well for ongoing evaluation and/or corrective action monitoring. Specifically, a dedicated <br /> submersible pump will be installed; this pumping equipment will also be used to collect the <br /> baseline samples. The initial samples will be analyzed for constituents in accordance with the <br /> requirements shown in Table I of the Kruger Foods—SMS Briners tentative revised Monitoring <br /> and Repotting Program (July 15, 2004). Sampling will be conducted in accordance with <br /> standardized procedures, as discussed below. <br /> Pur ng and Sampling <br /> During purging, indicator parameters will be measured, including specific conductance(EC), <br /> pH, dissolved oxygen, turbidity, temperature, and redox. Indicator readings will be recorded on <br /> a field data sheet. Static and pumping water level measurements, pumping rate, measurement <br /> time, and all field parameters will also be recorded. <br /> Purging will include removal of at least three casing volumes. Field parameters will be checked <br /> to ensure water quality has stabilized. Upon achieving stabilization of indicator parameters, <br /> ground-water samples will be collected for analysis. <br />